Hi Robert, My apologies to you and the Forum for how I question every e-mail, but no, I'm neither a troll nor a lawyer. I'm actually a software engineer with a physics background.
Thank you for showing me the chain of events that occur when the power button is pushed. I now understand what Gerald meant: systemd was the SW he was referring to, and depending on the image, the SW might not support this chain. According to the cat /etc/dogtag command, our image is BeagleBoard.org BeagleBone Debian Image 2014-04-23 And according to the SparkFun Electronics <https://www.sparkfun.com/products/12857> website where my team HW lead bought our BBB, the rev is Rev C - DEV-12857 Since the Beagleboard:BeagleBoneBlack - eLinux.org <http://elinux.org/Beagleboard:BeagleBoneBlack#Revision_A5A> wikipage says the power button was added in Rev A6A, then our BBB should be able to execute the chain. I tried it, and it works. I also ran the shutdown command (actually, shutdown -h now, based on what I read in the other Forum topics), and it worked. The wikipage also recommends issuing the halt command to power off the board; I tried that, too, and it also worked. I have instructed my teammates to use the halt command, as it entails less typing and avoids the problem of fat fingers pushing the wrong component on the board. However, not fifteen minutes after I told the HW lead, he unceremoniously pulled the USB cable out without issuing the halt command. Sigh... In any case, we now know the required shutdown procedure for the BBB. Thank you, Robert, Gerald, and cmbaker3, for your assistance. We really appreciate it. Best regards, Lawrence On Monday, August 24, 2015 at 4:24:13 PM UTC-7, RobertCNelson wrote: > > On Sat, Aug 22, 2015 at 12:50 AM, <[email protected] <javascript:>> > wrote: > > Hi Gerald, > > > > Do you mean the Linux umount command to un-mount the drive(s)? In an > > earlier post, you said, "Assuming that the SW supports the power button > > function." Were you saying that the umount command is assumed to > support > > the function of the power button? > > > > Lawrence > > Lawrence, are you a troll or lawyer? Based on how you question every > email... > > With the "current" images.. > > Push button -> signal to systemd -> systemd starts standard shutdown... > > If your "image" doesn't do that, it's not "current"... > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
